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Add surface-to-png in the quartz boilerplate

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The cairo-boilerplate static library cannot use private API defined in
the main Cairo shared library, because it has no access to those
symbols.

Since the code is small, we can just dump it into the boilerplate
library.
This commit is contained in:
Emmanuele Bassi 2023-08-13 15:47:20 +01:00
parent 77c2820840
commit ff02c2c268
1 changed files with 78 additions and 2 deletions
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80
boilerplate/cairo-boilerplate-quartz.c
View file

@ -28,6 +28,40 @@
#include <cairo-quartz-private.h>
#include <dlfcn.h>
#ifndef RTLD_DEFAULT
#define RTLD_DEFAULT ((void *) 0)
#endif
/*
* macOS Private functions
*/
typedef enum {
kCGContextTypeUnknown,
kCGContextTypePDF,
kCGContextTypePostScript,
kCGContextTypeWindow,
kCGContextTypeBitmap,
kCGContextTypeGL,
kCGContextTypeDisplayList,
kCGContextTypeKSeparation,
kCGContextTypeIOSurface,
kCGContextTypeCount
} CGContextType;
static unsigned int (*CGContextGetTypePtr) (CGContextRef) = NULL;
static void
quartz_ensure_symbols (void)
{
static cairo_bool_t symbol_lookup_done = FALSE;
if (!symbol_lookup_done) {
CGContextGetTypePtr = dlsym (RTLD_DEFAULT, "CGContextGetType");
symbol_lookup_done = TRUE;
}
}
static cairo_surface_t *
_cairo_boilerplate_quartz_create_surface (const char *name,
cairo_content_t content,
@ -47,6 +81,48 @@ _cairo_boilerplate_quartz_create_surface (const char *name,
return cairo_quartz_surface_create (format, width, height);
}
static bool
cg_context_is_bitmap (CGContextRef context)
{
quartz_ensure_symbols ();
if (likely (CGContextGetTypePtr)) {
return CGContextGetTypePtr (context) == kCGContextTypeBitmap;
}
return CGBitmapContextGetBitsPerPixel (context) != 0;
}
static cairo_status_t
_cairo_boilerplate_quartz_surface_to_png (cairo_surface_t *surface,
const char *dest)
{
CGContextRef context = cairo_quartz_surface_get_cg_context (surface);
if (!context || !cg_context_is_bitmap (context)) {
return CAIRO_STATUS_SURFACE_TYPE_MISMATCH;
}
CGImageRef image = CGBitmapContextCreateImage (context);
CFStringRef png_utti = CFSTR("public.png");
CFStringRef path;
CFURLRef url;
CGImageDestinationRef image_dest;
path = CFStringCreateWithCString (NULL, dest, kCFStringEncodingUTF8);
url = CFURLCreateWithFileSystemPath (NULL, path, kCFURLPOSIXPathStyle, FALSE);
image_dest = CGImageDestinationCreateWithURL (url, png_utti, 1, NULL);
CGImageDestinationAddImage (image_dest, image, NULL);
CGImageDestinationFinalize (image_dest);
CFRelease (url);
CFRelease (path);
CGImageRelease (image);
return CAIRO_STATUS_SUCCESS;
}
static const cairo_boilerplate_target_t targets[] = {
{
"quartz", "quartz", NULL, NULL,
@ -56,7 +132,7 @@ static const cairo_boilerplate_target_t targets[] = {
cairo_surface_create_similar,
NULL, NULL,
_cairo_boilerplate_get_image_surface,
_cairo_quartz_surface_to_png,
_cairo_boilerplate_quartz_surface_to_png,
NULL, NULL, NULL,
TRUE, FALSE, FALSE
},
@ -68,7 +144,7 @@ static const cairo_boilerplate_target_t targets[] = {
cairo_surface_create_similar,
NULL, NULL,
_cairo_boilerplate_get_image_surface,
_cairo_quartz_surface_to_png,
_cairo_boilerplate_quartz_surface_to_png,
NULL, NULL, NULL,
FALSE, FALSE, FALSE
},